| /**************************************************************************** |
| * |
| * cffcmap.c |
| * |
| * CFF character mapping table (cmap) support (body). |
| * |
| * Copyright (C) 2002-2022 by |
| * David Turner, Robert Wilhelm, and Werner Lemberg. |
| * |
| * This file is part of the FreeType project, and may only be used, |
| * modified, and distributed under the terms of the FreeType project |
| * license, LICENSE.TXT. By continuing to use, modify, or distribute |
| * this file you indicate that you have read the license and |
| * understand and accept it fully. |
| * |
| */ |
| |
| |
| #include <freetype/internal/ftdebug.h> |
| #include "cffcmap.h" |
| #include "cffload.h" |
| |
| #include "cfferrs.h" |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /***** *****/ |
| /***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/ |
| /***** *****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| cff_cmap_encoding_init( CFF_CMapStd cmap, |
| FT_Pointer pointer ) |
| { |
| TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| CFF_Encoding encoding = &cff->encoding; |
| |
| FT_UNUSED( pointer ); |
| |
| |
| cmap->gids = encoding->codes; |
| |
| return 0; |
| } |
| |
| |
| FT_CALLBACK_DEF( void ) |
| cff_cmap_encoding_done( CFF_CMapStd cmap ) |
| { |
| cmap->gids = NULL; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt ) |
| cff_cmap_encoding_char_index( CFF_CMapStd cmap, |
| FT_UInt32 char_code ) |
| { |
| FT_UInt result = 0; |
| |
| |
| if ( char_code < 256 ) |
| result = cmap->gids[char_code]; |
| |
| return result; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt32 ) |
| cff_cmap_encoding_char_next( CFF_CMapStd cmap, |
| FT_UInt32 *pchar_code ) |
| { |
| FT_UInt result = 0; |
| FT_UInt32 char_code = *pchar_code; |
| |
| |
| *pchar_code = 0; |
| |
| if ( char_code < 255 ) |
| { |
| FT_UInt code = (FT_UInt)(char_code + 1); |
| |
| |
| for (;;) |
| { |
| if ( code >= 256 ) |
| break; |
| |
| result = cmap->gids[code]; |
| if ( result != 0 ) |
| { |
| *pchar_code = code; |
| break; |
| } |
| |
| code++; |
| } |
| } |
| return result; |
| } |
| |
| |
| FT_DEFINE_CMAP_CLASS( |
| cff_cmap_encoding_class_rec, |
| |
| sizeof ( CFF_CMapStdRec ), |
| |
| (FT_CMap_InitFunc) cff_cmap_encoding_init, /* init */ |
| (FT_CMap_DoneFunc) cff_cmap_encoding_done, /* done */ |
| (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, /* char_index */ |
| (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, /* char_next */ |
| |
| (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */ |
| (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */ |
| (FT_CMap_VariantListFunc) NULL, /* variant_list */ |
| (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */ |
| (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */ |
| ) |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /***** *****/ |
| /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ |
| /***** *****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| FT_CALLBACK_DEF( const char* ) |
| cff_sid_to_glyph_name( TT_Face face, |
| FT_UInt idx ) |
| { |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| CFF_Charset charset = &cff->charset; |
| FT_UInt sid = charset->sids[idx]; |
| |
| |
| return cff_index_get_sid_string( cff, sid ); |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| cff_cmap_unicode_init( PS_Unicodes unicodes, |
| FT_Pointer pointer ) |
| { |
| TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| CFF_Charset charset = &cff->charset; |
| FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
| |
| FT_UNUSED( pointer ); |
| |
| |
| /* can't build Unicode map for CID-keyed font */ |
| /* because we don't know glyph names. */ |
| if ( !charset->sids ) |
| return FT_THROW( No_Unicode_Glyph_Name ); |
| |
| if ( !psnames->unicodes_init ) |
| return FT_THROW( Unimplemented_Feature ); |
| |
| return psnames->unicodes_init( memory, |
| unicodes, |
| cff->num_glyphs, |
| (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, |
| (PS_FreeGlyphNameFunc)NULL, |
| (FT_Pointer)face ); |
| } |
| |
| |
| FT_CALLBACK_DEF( void ) |
| cff_cmap_unicode_done( PS_Unicodes unicodes ) |
| { |
| FT_Face face = FT_CMAP_FACE( unicodes ); |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| FT_FREE( unicodes->maps ); |
| unicodes->num_maps = 0; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt ) |
| cff_cmap_unicode_char_index( PS_Unicodes unicodes, |
| FT_UInt32 char_code ) |
| { |
| TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
| |
| |
| return psnames->unicodes_char_index( unicodes, char_code ); |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt32 ) |
| cff_cmap_unicode_char_next( PS_Unicodes unicodes, |
| FT_UInt32 *pchar_code ) |
| { |
| TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
| |
| |
| return psnames->unicodes_char_next( unicodes, pchar_code ); |
| } |
| |
| |
| FT_DEFINE_CMAP_CLASS( |
| cff_cmap_unicode_class_rec, |
| |
| sizeof ( PS_UnicodesRec ), |
| |
| (FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */ |
| (FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */ |
| (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */ |
| (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */ |
| |
| (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */ |
| (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */ |
| (FT_CMap_VariantListFunc) NULL, /* variant_list */ |
| (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */ |
| (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */ |
| ) |
| |
| |
| /* END */ |